Four deaths during a flash flood on Friday have spurred Pittsburgh officials to meet this week to discuss expanding the city's sewer-line capacity and establishing a flood-warning system. Two rainstorms overwhelmed the system, submerging roads and cars under as much as nine feet of water during rush hour and heaving several 300-pound manhole covers out of place. Several areas of the city are susceptible to flooding from rivers and neighborhoods, according to this report.

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